Working exclusively with Burton's Step On Bindings, the Ion Step On Boot delivers the aggressive flex and uncompromising support we've come to expect from Burton's flagship all-terrain boots. The Ions' liner is where we find most of the action happens. It brings an improved feel straight from the box and resists breakdown over the course of a long winter, retaining its responsiveness for seasons to come. Being thermo-moldable, it gets an exact fit to our feet and eliminating pressure points. Plus the DryRide Heat Cycle tech retains toasty warmth in frigid conditions, letting us ride comfortably all day when the snow is just too good to quit.